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We’ve Launched a New Website!

March 28, 2024

What A Mainstream Apprenticeship Looks Like

May 9, 2022

The Origins Of Mainstream

January 27, 2022

Mainstream Electric, Heating, Cooling & Plumbing Named Winner of BBB Torch Awards

October 28, 2021

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More Info

License Numbers

WA General Contractor
WA CC MAINSEL782UQ
WA Master Plumbing
WA PC MAINSEL783C8
WA Electrical
WA EC MAINSEL782DQ
ID Division of Occupational & Professional
RCE-50061
ID Septic Installer
15-107184
ID Plumbing
0661089
ID Electrical
ELE-J-18552
ID HVAC
021329

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